I think the business of running a scam or a fraudulent company is quite different to an actual business.
Now? Yes for Kenneth Lay (assuming he was still alive and/or not hiding on a desert island under a new identity if I put on my tin foil hat)... Madoff, probably not.
AND ... post the WeWork debacle, Neumann has once again succeeded in raising a massive investment.
There is bound to be a few people who have a soft spot and will give him money again .